PDFsharp & MigraDoc Foundation

        private void testScaleADocument()
        {
           
            PdfSharp.Drawing.XGraphics gfx;

            //Create Source Document
            File.Copy(this.pdfFileForRead, this.pdfFileForWriteTmp, true);

            //Open the source document
            PdfSharp.Pdf.PdfDocument doc = PdfSharp.Pdf.IO.PdfReader.Open(pdfFileForWriteTmp, PdfSharp.Pdf.IO.PdfDocumentOpenMode.Import);

            // Create the output document
            PdfSharp.Pdf.PdfDocument outputDocument = new PdfSharp.Pdf.PdfDocument();
 
            foreach (PdfSharp.Pdf.PdfPage page in doc.Pages)
            {
                //Add the page to the output document, which returns
                //a new page object relative to the output document
                PdfSharp.Pdf.PdfPage newPage = outputDocument.AddPage(page);

                //Transform the page
                gfx = PdfSharp.Drawing.XGraphics.FromPdfPage(newPage);
                gfx.ScaleTransform(0.9);
               
            }

            outputDocument.Save(this.pdfFileForScalingWrite);
            doc.Close();
            outputDocument.Close();

            Process.Start(this.pdfFileForScalingWrite);
        }
    }

        private void testScaleADocument()
        {
           
            PdfSharp.Drawing.XGraphics gfx = null;
            PdfSharp.Drawing.XRect rect;
            PdfSharp.Pdf.PdfPage newPage;
 
            //Create Source Document
            File.Copy(this.pdfFileForScaling, this.pdfFileForWriteTmp, true);

            //Open the source document as XPdfForm object
            PdfSharp.Drawing.XPdfForm form =
            PdfSharp.Drawing.XPdfForm.FromFile(this.pdfFileForWriteTmp);

            // Create the output document
            PdfSharp.Pdf.PdfDocument outputDocument
                = new PdfSharp.Pdf.PdfDocument();

            for (int i = 0; i < form.PageCount; i++)
            {
                //Create a new page in the output document, which returns
                //a new page object relative to the output document
                newPage = outputDocument.AddPage();

                //Create a graphics element from the OUTPUT page
                gfx = PdfSharp.Drawing.XGraphics.FromPdfPage(newPage);

                //Set the source page number to indicate which page number to
                //work with.  The page number is one-based.
                form.PageNumber = i + 1;
                rect = new PdfSharp.Drawing.XRect(0, 0, newPage.Width, newPage.Height);

                //Set the scaling, which affects operations that follow.
                //Must be set prior to operations that require scaling.
                gfx.ScaleTransform(0.5);

                // Draw the page identified by the page number (set above)
                // as an image into a XRect
                gfx.DrawImage(form, rect);

            }

            //Write the new output PDF file to disk.
            outputDocument.Save(this.pdfFileForScalingWrite);
           
            //Cleanup
            form.Dispose();
            outputDocument.Close();
            if (gfx != null)
                gfx.Dispose();
               
            //View
            Process.Start(this.pdfFileForScalingWrite);
        }